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Before a marine diesel engine is started the cylinders and pistons must be _____.

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lag behind the increased fuel supplied to the engine  enter the engine along with the increase in the fuel  enter the engine before the increased fuel supply  leave the turbocharger as a negative pulse  
compressed air  electricity  hydraulic oil  compressing air  
reduce lube oil temperature  raise exhaust temperature reduce  excessive heating of engine room  reduce load on cooling water pump  
a single, long-stroke, slow-speed, turbocharged, two-stroke diesel engine  a single, long-stroke, medium-speed, turbocharged, four-stroke diesel engine  two medium-speed, turbocharged, four-stroke diesel engines  a variable-speed AC generator  
doing  make  turn  operating  
The coolant temperature must be maintained at 180 ℃  The thermostatic bypass valves must be manually opened before the engine is started  The pressure cap must be removed while the engine is secured  Electrical power to the heater must be secured before the cooling system is drained  
casting interlocking components  welding plates to form sections for assembly  forging integral components  case hardening integral components  
respectable  respectful  respective  respectively  
principle  principal  cause  case  
found out  eliminated  avoided  lowered  
big size  fuel economy  low speed  high power  
after TDC  before TDC  after BDC  before BDC  
supplying high pressure oil into a hydraulic motor  supplying high temperature air into the cylinder  supplying high pressure air into the cylinder  electrical igniting  
A common rail engine, conventional engines  A conventional engine, common rail engines  A marine diesel engine, most other engines  A two-stroke engine, four-stroke engines  
reduce electrolytic action on heat exchanger metals  keep heat transfer surfaces shiny and clean  prevent rapid accumulation of marine growth  provide a protective coating on heat exchanger surfaces  
after TDC  before TDC  after BDC  before BDC  
just below the crankcase  the oil cup for the exhaust valve  the pan for collecting drain fuel oil  oil circulating pump  
internal crankshaft passages  immersion in oil  splash lubrication  injection lubrication  
governor sensitivity  exhaust temperature  fuel injection pressure  speed of the can shaft  
cylinder covers  lubricating space  crosshead  exhaust manifold  

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